Unnamed Cu occurrence [1], Bolinas, Marin County, California, USAi
| Regional Level Types | |
|---|---|
| Unnamed Cu occurrence [1] | Occurrence |
| Bolinas | - not defined - |
| Marin County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 57' 7'' North , 122° 41' 54'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Bolinas | 1,620 (2011) | 4.9km |
| Lagunitas-Forest Knolls | 1,819 (2011) | 7.3km |
| San Geronimo | 446 (2011) | 7.4km |
| Stinson Beach | 632 (2011) | 7.5km |
| Woodacre | 1,348 (2011) | 8.2km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| San Francisco Gem and Mineral Society, Inc. | San Francisco, California | 31km |
| Vallejo Gem & Mineral Society | Vallejo, California | 42km |
| Northern California Geological Society | Orinda, California | 46km |
Mindat Locality ID:
81912
Long-form identifier:
mindat:1:2:81912:8
GUID (UUID V4):
8e3df859-be5f-4f3d-a7cd-75058ca5e5b0
A former Cu occurrence/mine located in the S½ sec. 1, T1N, R8W, MDM, 4.9 km (3.0 miles) NNW of Bolinas, along Copper Mine Gulch, on federal land administered by the National Park Service (Golden Gate National Recreation Area). Section number questionable; MRDS stated accuracy for this location is 1,000 meters. More than one mine in this area. This locality may be synonymous with the Union Gulch Mine (https://www.mindat.org/loc-81905.html).
Local rocks include Franciscan Complex, unit 1 (Coast Ranges).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
2 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 Description: Occurs in veins in serpentine. |
| ⓘ Pyrite Formula: FeS2 Description: Occurs in veins in serpentine. |
| ⓘ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Unclassified | |||
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| O | Oxygen | |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Si | Silicon | |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS MRDS: | 10187925 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Franciscan DomainDomain
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References
